The Cat 277D, which weighs 4.6 tons, drove over 600 of the B15 smartphones spaced precisely to ensure each tread of the machine would line up with a column of them. After being run over, every single smartphone remained intact and operational — including the one added to the group that had been dropped from the Cat MH3049. More on the stunt, and the making of the video, is available on Caterpillar’s website.